Iranian officials say they have located the site of a plane crash that killed all 65 people on board last week.

Iran has located the wreckage of a passenger plane that went down in a mountainous part of the country earlier this week, killing all 65 people on board.

A military drone was used to locate the crash site and two helicopters were then dispatched to the snow-covered scene, Iranian Revolutionary Guard Corps spokesman Ramezan Sharif told Iran's state television on Tuesday.

"The plane had hit top of the mountain before crashing 30 metres further down," Sharif said.

The Aseman Airlines plane went down in the Zagros Mountain range in central Iran on Sunday during a domestic flight from the Iranian capital, Tehran, to the southwestern city of Yasuj.

It had been carrying 59 passengers and six crew members, all of whom died in the crash, according to Iran's state-run Press TV.

Parts of the airplane have been found at an altitude of about 3,500 metres, according to state television broadcasts of the rescue mission.

The search will continue on foot as the mountainous terrain made a helicopter landing impossible, a spokesperson for Iran's emergency service agency said.

Weather blamed

Aseman Airlines has blamed hazardous weather conditions for the crash, dismissing the possibility that it was the result of a technical failure.